Switchable and Tunable Terahertz Metamaterial Absorber with Ultra-Broadband and Multi-Band Response for Cancer Detection

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15640%2F25%3A73630588" target="_blank" >RIV/61989592:15640/25:73630588 - isvavai.cz</a>

Result on the web

<a href="https://www.mdpi.com/1424-8220/25/5/1463" target="_blank" >https://www.mdpi.com/1424-8220/25/5/1463</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/s25051463" target="_blank" >10.3390/s25051463</a>

Result language

angličtina

Original language name

Switchable and Tunable Terahertz Metamaterial Absorber with Ultra-Broadband and Multi-Band Response for Cancer Detection

Original language description

This paper proposes a switchable and tunable terahertz metamaterial absorber utilizing a graphene-VO2 layered structure. The design employs reconfigurable seven-layer architecture from top to bottom as (topaz/VO2/topaz/Si/graphene/topaz/Au). CST software 2018 was used to simulate the absorption properties of terahertz waves (0-14 THz). The proposed metamaterial exhibits dual functionalities depending on the VO2 phase state. In the insulating state, the design achieves a tri-band response with distinct peaks at 3.12 THz, 5.65 THz, and 7.24 THz. Conversely, the VO2&apos;s conducting state enables ultra-broadband absorption from 2.52 THz to 11.62 THz. Extensive simulations were conducted to demonstrate the tunability of absorption: Simulated absorption spectra were obtained for broadband and multi-band states. Electric field distributions were analyzed at resonance frequencies for both conducting and insulating states. The impact was studied of VO2 conductivity, loss tangent, and graphene&apos;s chemical potential on absorption. The influence was investigated of topaz layer thickness on the absorption spectrum. Absorption behavior was examined of VO2 under different states and layer configurations. Variations were analyzed of absorption spectra with frequency, polarization angle, and incident angle. The proposed design used for the detection of cervical and breast cancer detection and the sensitivity is about is 0.2489 THz/RIU. The proposed design holds significant promise for real-world applications due to its reconfigurability. This tunability allows for tailoring absorption properties across a broad terahertz range, making it suitable for advanced devices like filters, modulators, and perfect absorbers.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10406 - Analytical chemistry

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

SENSORS

ISSN

1424-8220

e-ISSN

1424-3210

Volume of the periodical

25

Issue of the periodical within the volume

5

Country of publishing house

CH - SWITZERLAND

Number of pages

23

Pages from-to

nestránkováno

UT code for WoS article

001443512300001

EID of the result in the Scopus database

2-s2.0-86000491304